Results 161 to 170 of about 237,520 (386)

Enhancing the rate of tidal disruptions of stars by a self-gravitating disc around a massive central black hole

EPJ Web of Conferences, 2012
We further study the idea that a self-gravitating accretion disc around a supermassive black hole can increase the rate of gradual orbital decay of stellar trajectories (and hence tidal disruption events) by setting some stars on eccentric trajectories ...
Šubr L., Karas V.
doaj   +1 more source

MOCCA Survey Database I: Dissolution of tidally filling star clusters harbouring BH subsystems

, 2019
We investigate the dissolution process for dynamically evolving star clusters embedded in an external tidal field by exploring the MOCCA Survey Database I, with focus on the presence and evolution of a stellar-mass black hole subsystem. We argue that the
Askar, Abbas, Giersz, Mirek, Hypki, Arkadiusz, Leveque, Agostino, Spurzem, Rainer, Wang, Long   +5 more
core   +2 more sources

Entropy of Intermediate-Mass Black Holes

, 2009
Observational searches for Intermediate-Mass Black Holes (IMBHs), defined to have masses between 30 and 300,000 solar masses, provide limits which allow up to ten percent of what is presently identified as halo dark matter to be in the form of IMBHs.
openaire   +2 more sources

Highly Active Air Electrode with Enhanced Proton Conduction via Isovalent Doping in a Layered Perovskite for Reversible Protonic Ceramic Cells

Advanced Functional Materials, EarlyView.
A Ni‐doped PBSCN20 air electrode is proposed as a promising air electrode material for reversible protonic ceramic cells. An isovalent doping significantly facilitates oxygen vacancy formation and proton uptake while simultaneously reducing the energy barrier for proton migration.
Jiwon Yun, Hyeongsik Shin, Seungchan Kim, Boseok Seong, Seongjae Lee, Kyeounghak Kim, Sun Hee Choi, Sihyuk Choi   +7 more
wiley   +1 more source

Ultradeep ATCA Imaging of 47 Tucanae Reveals a Central Compact Radio Source

The Astrophysical Journal
We present the results of an ultradeep radio continuum survey, containing ∼480 hr of observations, of the Galactic globular cluster 47 Tucanae with the Australia Telescope Compact Array.
Alessandro Paduano, Arash Bahramian, James C. A. Miller-Jones, Adela Kawka, Tim J. Galvin, Liliana Rivera Sandoval, Sebastian Kamann, Jay Strader, Laura Chomiuk, Craig O. Heinke, Thomas J. Maccarone, Stefan Dreizler   +11 more
doaj   +1 more source

Phenomenological Analogies in Black Hole Systems of all Masses

, 2004
I review the progress made on the physics of relativistic jets from black hole systems in the context of the analogy between AGN and microquasars that was proposed one decade ago.
Mirabel, I. F.
core   +2 more sources

Unraveling Mixed‐Defect Transformations and Passivation Dynamics in Silicon Heterojunction Solar Cells

Advanced Functional Materials, EarlyView.
Defects in materials coexist in multiple forms, undergo dynamic transformations, and influence the material properties. Here, the dynamic transformations of passivation‐related defects in silicon heterojunctions are revealed through the decomposition of dual‐phase capacitance transients.
Do Hoe Kim, Joon‐Ho Oh, Tae Kyung Lee, Yongrae Kim, Jeong‐Ho An, Seo Woo Sim, Yun‐Tak Han, Jin Young Lee, Munse Kim, Kyuhyeon Im, Yong‐Jin Kim, Unsoo Kim, Kyung Taek Jeong, Min Gu Kang, Sang Hee Lee, Yunae Cho, Hee‐Eun Song, Ka‐Hyun Kim   +17 more
wiley   +1 more source

Little Red Dots Are Tidal Disruption Events in Runaway-collapsing Clusters

The Astrophysical Journal Letters
I hypothesize a physical explanation for the “little red dots” (LRDs) discovered by the James Webb Space Telescope (JWST). The first star formation in the Universe occurs in dense clusters, some of which may undergo runaway collapse and form an ...
Jillian Bellovary
doaj   +1 more source

Emission lines from tidally disrupted white dwarfs and other evolved stars

EPJ Web of Conferences, 2012
When a black hole tidally disrupts a star, accretion of the debris will produce a luminous flare and reveal the presence of a dormant black hole. The accretion flare can also photoionize a portion of the post-disruption debris.
Sigurdsson S., Eracleous M., Clausen D., Irwin J.A.   +3 more
doaj   +1 more source

The Intermediate Mass Black Hole Candidate in the Center of NGC 404: New Evidence from Radio Continuum Observations

, 2012
We present the results of deep, high-resolution, 5 GHz Expanded Very Large Array (EVLA) observations of the nearby, dwarf lenticular galaxy and intermediate mass black hole candidate (M ~4.5 x 10^5 M_sun), NGC 404.
Marvil, Josh, Nyland, Kristina, Wrobel, Joan, Young, Lisa, Zauderer, B. Ashley   +4 more
core   +1 more source